313111212 has 24 divisors (see below), whose sum is σ = 731610096. Its totient is φ = 104225088.

The previous prime is 313111199. The next prime is 313111217. The reversal of 313111212 is 212111313.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 313111191 and 313111200.

It is not an unprimeable number, because it can be changed into a prime (313111217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9003 + ... + 26594.

It is an arithmetic number, because the mean of its divisors is an integer number (30483754).

Almost surely, 2^313111212 is an apocalyptic number.

It is an amenable number.

313111212 is an abundant number, since it is smaller than the sum of its proper divisors (418498884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

313111212 is a wasteful number, since it uses less digits than its factorization.

313111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36337 (or 36335 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 313111212 is about 17694.9487707651. The cubic root of 313111212 is about 679.0465385856.

Adding to 313111212 its reverse (212111313), we get a palindrome (525222525).

It can be divided in two parts, 31311 and 1212, that added together give a palindrome (32523).

The spelling of 313111212 in words is "three hundred thirteen million, one hundred eleven thousand, two hundred twelve".